Return water trap



Get. 30 1923. 1,472,232

7 w. I. STAAF RETURN WATER TRAP Filed Marci-1&6, 1920 2 Sheets-Sheet 1Oct. 30, 1923. 1,472,232

W. l. STAAF RETURN WATER TRAP Filed March 6, 1920 2 Sheets -Sheet 2Patented Got. 39, 1923. v

UNITED PATENT OFFICE.

WERNER I. STAAF, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN-MENTS, OF ONE-HALF TO LULA. HARRINGTON TYLER, F PITTSBURGH, PENNSYL-VANIA.

RETURN WATER TRAP.

Application filed March 6, 1920. Serial No. 368,790.

T 0 all whom it may concern: ner of operation within the scope of theap- Be it known that I, lVnnNnR I. STAAF, a pended claims withoutdeparting from the citizen of the United States, residing at spirit ofthe invention, and in which: Pittsburgh, in the county of Allegheny andFigure l is a perspective view of a trap 5 State of Pennsylvania, haveinvented a new construction in accordance with the present and usefulImprovement in Return WVater invention; Traps, of which the followingisafull, clear, Figure 2 is a view partly in section and exactdescription. through the trap illustrating the location of The presentinvention relates broadly to the nlet and outlet connections; 1 traps,and more particularly to traps adapt- F lgure 3 is a side elevation ofthe trap in ed for use in steam heating systems for renormal position;and

ceiving the water of condensation and boiler Figure 4 is a sideelevation corresponding feed water, and returning the same to the toFigure 3 of the trap in discharging pomain power or heating boiler.sition.

1 One of the principal objects of the present Referring moreparticularly to the drawinvention is to so mount the trap that the ings,there is provided a drum 2 which may weight thereof is largelyeliminated from the he cylindrical in outline, and which ispreftrunnions and packing. erably formed to provide a portion of rela-An important object of the present inventively small diameter and aportion of rela- 20 tion is to providea return trap which will tivelylarge diameter. Extending into the automatically discharge and resetitself each drum through opposite sides of the portion time apredetermined amount of water is of the smaller diameter are hollowtubes 4: received thereby. and 4c. These tubes preferably communi-Another object of the invention is to procate respectively with an inletconnection 5 25 vide atrap permitting free ingress of water and anoutlet or discharge connection 6, and of condensation of boiler feedwater until a form trunnions or pivotal mountings for the predeterminedamount has been received, drum 2. These trunnions are carried by a afterwhich the trap will be automatically cradle 7 supported in any desiredmanner on connected to a source of pressure effective a suitable base 8.

30 for discharging the freed contents there- For holding the drum 2normally in the {form position shown in Figure 3 of the drawings,

Still another object of the invention is to there is provided a yoke 9pivotally secured provide an automatically tilting and reset to theportion of the drum of larger ting trap suitably counter-weightedwhereby diameter and extending beneath the same.

35 the entire device operates freely with a mini- Pivotally securedtothe yoke 9 is a lever mum of wear on the mountings. 10 provided on oneend with an adjustable A further object of the present inventioncounterweight 11 and pivoted adjacent its is to provide a return trap ofthe character opposite end in the cradle 7. The yoke 9 referred tohaving inlet and outlet connecis connected to the drum at such a point40 tions which form the pivotal mounting for that the center of gravityof the drum exth t tends 'therethrough, thereby practically bal- Theforegoing and other objects, together ancing the drum through thecounterweight with their attendant advantages, will be ap- 11 andrelieving the trunnions 4 and 4B of apparent as the invention becomesbetter unthe weight pressure. This insures freer opderstood byreferences to the accompanying eration of the drum, and eliminates to aspecification and drawings. forming a part large extent undue wear onthe trunnion thereof, it being premised that changes may packings.

be made in the various details and the man- (ommunicating with the drumat any devalve 14, which is normally in such position that air may passfreely from the interior of the drum through the connection 12 to thevalve 14: and then through the pipe 15 to an outlet 16.

The outlet from the drum is normally closed by a rotary disk valve 17,and a similar valve 18 normally shuts off communication with theinterior of the drum from a high pressure line 19. In most instancesthe.

high pressure line will be connected with a source of steam underpressure. 'Both of the disk valves 17 and 18 are of usual construction,adapted upon rotation to bring the cutaway portions 20 intocommunication with the ports 21; The valves are normally held inposition against their seats by suitable compression springs 22, and areactuated by rods 24, provided on their opposite ends with bifurcatedlevers 25 straddling a pin 26 carried by the drum 2. r 7

Upon tilting the drum, the pin 26 will rockthe levers 25 and impart thedesired rotary movement to the valves 17 and 18. Communicating with theoutlet connection through the trunnion a is a downwardly extendingnozzle 27 terminating adjacent the bottom of the portion of the drum 2of larger diameter. When steam pressure is admitted to the interior ofthe drum, the nozzle 27 is effective for discharging the watertherefrom. From the foregoing it will be apparent that the improved trapis connected to the heating system, preferably in a branch of the returnto the main power or heating boilers, so that the inlet connection 5 isadapted to receive water of condensation or boiler feed water throughthe pipe 28 extending into the inlet connection on the opposite side ofthe valve 18 from. the high pressure connection 19. This water, due tothe provision of the air relief valve 14 may normally flow into theinterior of the drum. This operation will'continue until a predetermined amount of water has been received 'by the drum, whereupon thecounterweight llwill be overcome and the drum will tilt automatically tothe-position shown more particularly in Figure 4. This will result inrotating the air relief valve 14; and cutting off the "escape of airfrom the inte 'rior of the drum. valve 17- no-rmally closing the outletconnection 6, and the valve 18 normally cutting off the steam pressurefrom theinterior of the drum, will both be rotated by the mechanismprovided, to open the respective ports controlledthereby. This willpermit steam to freely enter the interior of the drum and "force thewater through the outlet connection back intothe main power or heatingAt the same time the 1 ,avaeee boiler. Both the inlet connection 5 andthe outlet connection 6 may be providedwvith' suitable check valvesofany usual construction preventing backward flow. As soon as the drumhas been discharged, the counter-V weight will be effective forautomatically resetting it.

The advantages of the present invention arise from a construction. inwhich the weight of the drum is carried by a' counterweight, therebyenabling all of the vparts to move freely. Further advantages arise fromthe provision of an air escapeopen- .in automatically. 7

till further advantages arise from the construction and operation of theinlet and outlet connections which serve as trunnions supporting the'drum.- I claim:

1. 'A return trap, comprising a drum hav- *7 tary valves normallyclo-sing said last two connections, and means operative upon tiltingmovement of the drum for rotating said valves and openingsaicl'connections, substantially as described.

2. Areturn trap, comprising a drum having a normally opening air escape,hollow trunnions forming atilting mounting therefor, a counterweightconnected to said drum, a normally open inlet connection communicatingwith one ofsaid trunnions, a normally closed outlet connectioncommunicating with the other of said trunnions, a pressure connection,rotary valves for said last two connections, singular means operativeupon tilting movement of the drum for rotating said valves, and meansoperable simultaneously therewith for closing'said airescape,substantially as described. 1

3. A return trap, comprising a tilting drum having hollow'tru-nnionsforming a tilting mounting therefor, a counterweight normally holdingsaid drum against tilting movement, said counterweight relieving the 7weight of the drum from said trunnions, a fixed connection for each ofsaid trunnions having an opening communicating with the trunnions, and arotating controlling valve in each of said'connections, substantially asdescribed;

4. A return trap, comprising a tilting.

drum having hollow trunnions pivotally supporting the same, meansrelieving the weight of the drum from said trunnions, a

fixed connection foreach of said trunnions having an openingcommunicating with the 5 drum having hollow trunnions hollow trunnions,and a rotating controlling valve in each of said connections,substantially as described.

connections, and means controlled by the 10 tilting movement of saiddrum for rotating said controlling valves, substantially as described.

In testimony whereof, I have hereunto set my hand.

WERNER I. STAAF. Witness:

J. A. YOUNG.

